Electric switch



Feb. 16,1926. h 1,573,164

G. H. HART ELECTRIC SWITCH Filed Jan. 17 1925 l etented eb. 16, 1.926.

GEORGE HEGEMAN HART, OF WEST HARTFORD, CONNECTICUT.

ELECTRIC SWITCH.

Application filed January 1'7, 1925.

To all whom it may concern."

Be it known that I, Gnonen I-InenMAn I'IART, a citizen of the United States, and a resident of West Hartford, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Electric Switches, of which the following is a specification. p

This invention relates to electric switches, for instance, of the type having a plurality of terminals mounted on a base, a rotatable switch blade or blades, and means for rotating the switch blade or blades for throwing the same into and out of engagement with the terminals. v

The invention relates, more particularly, to the manner in which the terminals are associated with the base, and the aim of the invention is to provide an improved and novel arrangement by means of which the terminals are very effectively, economically and securely anchored to the base, the arrangement being such that each terminal cannot, in any way whatsoever, change its relation to the base, the terminals being held against turning or canting movements in all directions.

Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the features of construction, combination of elenents and arrangements of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the appended claims.

In the accompanying drawings, wherein I have shown, for illustrative purposes, one embodiment which the present invention mayctake, it being understood that this disclosure is by way of illustration only and that the invention is susceptible of various modifications and changes:

Figure 1 is a top plan VlGW- of the switch base and two terminalsapplied thereto;

Fig. 2 is a side elevational view of what is shown in Fig. 1;

Fig. 3 is a sectional view taken on line 3-3 of Fig. 1; and

Fig. 4 is a perspective view of one of the terminals.

Referring to the drawings in detail, a designates a base of any suitable construction and formed of any desired insulating material, such as porcelain, This base, by

Serial No. 3,198.

preference, is generally circular and has an rwstandnw fian e rovided with reeves or i" t: a; p a channels 10 in. each of which is located a terminal designated generally by the letter blades and the operating mechanism therei for are not shown, as the particular constructions thereof form no part of the present invention. Each of the terminals, by preference, has

a body or supporting member 12 to which is secured one or more contacts 13 of any desired shape or type] By preference, the body portion 12 is in the form of a piece of metal bent to U shape and between the laterally extending arms of this member is secured the contact or contacts 13. The lower a "m 14 of the member 12 has a tapped hole 15 into which is adapted to be screwed a screw 16 extending upwardly through the bottom of the base. The upper arm 17 may also have a tapped hole 18 to receive a screw 19 by means of which the lead wires are connected to the terminal.

In accordance with the present invention, each terminal is provided with a pair of laterally extending and oppositely disposed ears or lugs, and the sides of the grooves 10 have recesses or depressions adapted to re ceive the respective lugs. In the present illustrative disclosure, one of the arms, by areference the upper arm 17, is provided with such projections or lugs designated by the numeral 20, and the notches or recesses which receive these grooves and which are designated by the numeral 21, are provided at each side of a groove 10 in the upper surface of the circular flange of the base. It will be noted from the drawings, that the lugs 20 fit more or less closely in the recesses or notches 21 and are seated against the bottoms of these recesses. With this arrangement, it will be observed that the terminals are very securely anchored in place and held against movement relative to the base in all directions. More particularly the terminals are held against a rotary movement and they are maintained by the interengaging lugs and recesses against canting or tilting laterally, all of which means that the contacts of the terminals will be held at all times-very rigidly in proper alinement with the switch blade or blades,

As many changes could be made in the above construction and many apparently Widely different embodiments of this. invention could be made Without departing from the scope thereof, it is intended that all matter contained in the above descrip-' tion or shown in the accompanying drawing shall be interpreted as illustratit'e and not in a limiting sense.

It is also to be understood that the language used in the following claims is intended to cover all of the generic i and specilic features of the invention herein described and all statementsot' the scope of the invention which. as a matter of language, might be said to fall therebetween.

1 claim as myinvention:

1. In an electric switch and in combination, a base providedzwith a groove having at its upper "end and at each side: a recess,

tion, a base .providedwith a groove having at its upper end and at each side a recess, a

terminal located in said groove and includinga Urshaped body member and a contact secured thereto, the upper arm of said body member havin laterall extendin lu 's on opposite sides engaging in said recess, and a screw extending upwardly through the base and threaded into the lower arm of said U-shaped member.

GEORGE HEGEBCIAN HAIR'I. 

